* made unlzx able to read from stdin instead of files to support pipeing
reason: just typeing:
> lzx -r a PIPE:backup.lzx
in an Amiga shell and
> copy PIPE:backup.lzx SER:
in another Amiga shell and
> cat < /dev/ttyS0 | unlzx -x -c
in the UNIX bash on the other side should make a real small but nice
backup system via serial cable. :o)